Reassessment of selected factors affecting siting of Nuclear Power Plants

Abstract

Brookhaven National Laboratory has performed a series of probabilistic consequence assessment calculations for nuclear reactor siting. This study takes into account recent insights into severe accident source terms and examines consequences in a risk based format consistent with the quantitative health objectives (QHOs) of the NRC's Safety Goal Policy.Simplified severe accident source terms developedin this study are based on the risk insights of NUREG-1150. The results of the study indicate that both the quantity of radioactivity released in a severe accident as well as the likelihood of a release are lower than those predicted in earlier studies.The accident risks using the simplified source terms are examined at a series of generic plant sites, that vary in population distribution, meteorological conditions, and exclusion area boundary distances. Sensitivity calculations are performed to evaluate the effects of emergency protective action assumptions on the risk of prompt fatality and latent cancers fatality, and population relocation.The study finds that based on the new source terms the prompt and latent fatality risks at all generic sites meet the QHOs of the NRC's Safety Goal Policy by margins ranging from one to more than three orders of magnitude.iii NUREiG/CR-6295

Use of PSA level 2 and level 3 risk insights in the siting of nuclear power plants

“…Brookhaven National Laboratory (BNL) performed a set of studies of probabilistic consequence assessment calculations for nuclear reactor siting [8]. This study considered (i) the insights into severe accident source terms that were gained in the NUREG-U50 study [9], (ii) the advances in the models of the health and safety of radiation embodied in a newer consequence models, and (iii) an examination of accident consequences in a risk based format consistent with the quantitative health objectives of the NRC's Safety Goal Policy [10].…”